000
AXPZ20 KNHC 272055
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 27 2012

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 08N83W TO 02N97W TO 04N105W THEN ITCZ TO 
07N112W TO 02N140W. SCATTERED MODERATE TO STRONG CONVECTION 
WITHIN 270 NM OF AXIS E OF 87W. SCATTERED MODERATE CONVECTION 
WITHIN 180 NM OF AXIS BETWEEN 87W AND 101W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 90 NM OF AXIS BETWEEN 120W AND 
134W. 

...DISCUSSION...
HIGH PRESSURE 1031 MB IS CENTERED NEAR 33N135W WITH RIDGE 
EXTENDING SE TO NEAR 20N112W. THE PRESSURE GRADIENT BETWEEN THIS 
FEATURE AND TROUGHING OVER MEXICO IS MAINTAINING FRESH NW WINDS 
WITHIN 240 NM OF W COAST OF BAJA CALIFORNIA. THE PRESSURE 
GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND LOWER PRESSURE IN 
THE VICINITY OF THE ITCZ IS MAINTAINING FRESH TRADEWINDS FROM 
04N TO 16N W OF 120W. THIS AREA OF FRESH TRADEWINDS ARE 
PROVIDING ENOUGH CONVERGENCE INTO THE ITCZ TO MAINTAIN THE AREA 
OF CONVECTION W OF 120W ALONG THE ITCZ AS MENTIONED ABOVE. THE 
AREA OF HIGH PRESSURE WILL MAINTAIN THROUGH THE NEXT TWO DAYS 
MAINTAINING THE AREA OF FRESH WINDS. 

DEVELOPING GALE N OF THE AREA WILL USHER IN A SET OF NW SWELL 
WITH COMBINED SEAS REACHING NEAR 13 FT BY SAT NIGHT. THIS SWELL 
WILL SPREAD SOUTHWARD THROUGH SUN AFTERNOON WITH COMBINED SEAS 
IN THE 10 TO 12 FT RANGE COVERING THE AREA N OF 22N BETWEEN 117W 
AND 127W. 

$$
AL